Navigational aid



FIG. 1 is a front elevational view of a navigational aid showing my new design;

FIG. 2 is a rear elevational view;

FIG. 3 is a right side elevational view, wrist band not shown for ease of illustration; and

FIG. 4 is a left side elevational view thereof, with wrist band not shown for ease of illustration. 

The ornamental design for a navigational aid, as shown and described. 